Kirill Alekseevich, a retired army officer, becomes the headmaster of the school. Accustomed to the rigor and routine of the day, he is faced with the chaotic bustle of everyday school life. It is not easy to find understanding with children and teachers, especially with Marina Maksimova, a literature teacher who is a favorite of students. However, Marina is surprised to discover in the "picky" Nazarov the insight, tact and experience of a teacher.